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<?php $str = 'a,b\\,c\\\\,d\\'; preg_match_all('/(?:[^\\\\,]|\\\\.$)+|\\\\$/', $str, $matches); var_dump($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" [4]=> string(1) "\" }

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